package com.lcm.oj.lanqiao.year2021.moni.c1;

/**
 * @author Coder-lcm
 * @date 2021/4/17
 */
public class T3 {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder();
        for (int i = 1; i <= 2020; i++) {
            sb.append(i);
        }
        System.out.println(sb.length());
    }
}
